Question

look what i say below before you answer!
What is the vertex for the function? y = x2 - 4x - 3
(-1, 2)
(0, -3)
(1, -6)
(2, -7)

Answer 1

okay i know how to find one vertex but since -b2(2a) would i make that -4 be a positive 4 cause neg.*neg. is positive? @jim_thompson5910

Answer 2

it should be

x = -b/(2a)

Answer 3

in this case, b = -4 and a = 1

Answer 4

so you are correct, the negative b will turn -4 into positive 4

Answer 5

so what is the x coordinate of the vertex?

Answer 6

just a sec. ill tell you

Answer 7

alright

Answer 8

x=2

Answer 9

good

Answer 10

now that you know the x coordinate of the vertex is x = 2, plug it into the equation to find y

Answer 11

this will give you the y coordinate of the vertex

Answer 12

okay thank you!

Answer 13

sure thing